Another newbie stupid question.

The Valiant was never really designed as a performance car whereas the Dart was available with the 340,383, and 440, therefore you`ll see many more Darts out there being raced, restored, and resurrected and thus a wider variety of available parts. It is much harder to find aftermarket metal for a Valiant than the Dart. To the Valiants advantage many parts are much cheaper than they are for the Darts and it has a shorter wheelbase than the Dart by 3", giving it a slight edge with weight distribution.